CN106756475A - Medium-high frequency motor 0.27mm thickness non-orientation silicon steels and production method - Google Patents

Medium-high frequency motor 0.27mm thickness non-orientation silicon steels and production method Download PDF

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CN106756475A
CN106756475A CN201611096915.2A CN201611096915A CN106756475A CN 106756475 A CN106756475 A CN 106756475A CN 201611096915 A CN201611096915 A CN 201611096915A CN 106756475 A CN106756475 A CN 106756475A
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temperature
high frequency
control
frequency motor
orientation silicon
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CN106756475B (en
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吕黎
冯大军
李准
陈圣林
杨光
石文敏
詹东方
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Wuhan Iron and Steel Co Ltd
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Wuhan Iron and Steel Corp
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    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
    • C21D8/12—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties
    • C21D8/1216—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties the working step(s) being of interest
    • C21D8/1222—Hot rolling
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
    • C21D8/12—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties
    • C21D8/1216—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties the working step(s) being of interest
    • C21D8/1233—Cold rolling
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
    • C21D8/12—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties
    • C21D8/1244—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties the heat treatment(s) being of interest
    • C21D8/1272—Final recrystallisation annealing
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/004—Very low carbon steels, i.e. having a carbon content of less than 0,01%
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/008—Ferrous alloys, e.g. steel alloys containing tin
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium

Abstract

Medium-high frequency motor 0.27mm thickness non-orientation silicon steels, its component and wt%：C：≤ 0.0028%, Si：2.61~3.05%, Al：1.05~1.48%, Mn：0.22~0.48%, Sn：0.14 ~ 0.49%, P≤0.022%, S:0.0015~0.0029%, N：0.001~0.0025%.Production method：With vacuum induction furnace smelting and ingot of casting；Heated after cogging；Hot rolling；Normalizing；Pickling；It is cold rolling；Finished products；The measurement of cooling, shearing, sample preparation, magnetic and mechanical performance.The present invention is ensureing magnetic property P1.0/400≤ 13.5w/kg, B5000On the premise of >=1.65T, the index of mechanical performance is taken into account by force than 0.74 ~ 0.78, the use requirement of manufacture medium-high frequency motor iron core can be met.

Description

Medium-high frequency motor 0.27mm thickness non-orientation silicon steels and production method
Technical field
The present invention relates to a kind of non-orientation silicon steel and its production method, the nothing for medium-high frequency motor is specifically belonged to Orientation silicon steel and production method.
Background technology
With electric automobile（EV）And hybrid automobile（HEV）Electronic product is to miniaturization, high precision int, high efficiency side To development, it is desirable to which making motor electric steel plate unshakable in one's determination must have the excellent electromagnetic propertys such as low iron loss and high magnetic flux density, Particularly there is requirement higher at aspects such as Thin Specs, magnetic strength high, low iron loss, coating quality and yield strengths.But, mesh Preceding process meanses, it is difficult to obtain the product that magnetic meets the requirements during thickness is reduced, main performance is exactly to make difficult Degree is big, lumber recovery is low, magnetic difference.
Motor requirement non-oriented electrical steel has：1st, Thin Specs, to meet low-loss requirement；2nd, low iron loss, to protect Temperature is no more than setting when card rotates at a high speed；3rd, magnetic strength high, to mitigate its weight and volume.4th, mechanical performance is moderate, should Intensity can not too high, again meet the requirement that intensity can not be too low when motor rotates at a high speed when meeting high speed punching.
Through retrieval：It is entitled《Possess the non-oriented electrical steel and its manufacture method of low iron loss and excellent processing characteristics》Day Patent document, be it discloses chemical constituent and wt%：Si：1.5 ~ 2.5%, Al：1.0 ~ 3.0%, Si+Al：3.5 ~ 5.0%, Mn：≤ 1.0%, C≤0.010%, S+N+Ti≤0.006%, remaining is Fe and remnants.It requires Al (%) >=Si (%), by 900 ~ Under 1200 DEG C × 20 ~ 300s normalizing, 70 ~ 85% cold rolling, the finished products of 900 ~ 1000 × 10 ~ 120s No yield point electricity is obtained Magnetic steel plate strip.The each element content range of the document is larger, and purity of steel requirement is high, and Technology for Heating Processing scope is excessively wide It is general, the preferable non-oriented magnetic steel sheet strip of frequency performance is obtained by adjusting annealing temperature and atmosphere, it is primarily directed to The control of surface microhardness, the magnetic property for lifting especially medium-high frequency to performance is not described.
It is entitled《The non-oriented magnetic steel sheet strip and its manufacture method of excellent magnetic》Japanese documentation, its disclosure Chemical constituent and wt% are：Si：0.7 ~ 1.7%, Al：1.6 ~ 2.5%, Si+Al：2.5 ~ 3.7%, Mn：0.10 ~ 0.50%, C： ≤ 0.005%, S：≤ 0.004%, remaining is Fe and remnants.Non-oriented magnetic steel sheet strip is obtained by common process.The document Silicon content it is relatively low, due to normalizing temperature need >=950 DEG C, influence the later stage rolling, therefore require cold rolling maximum temperature >= 150 DEG C, there is increase rolling difficulty and controlled with energy consumption.Its final acquisition B5000/ Bs >=0.83, P1.5/50The magnetic of≤2.5W/kg Property.Cold rolling load is big in production, uneconomical.
It is entitled《Possess the non-oriented electrical steel and its manufacture method of low iron loss and suitable processing characteristics》Japan Patent Document, be it discloses chemical constituent and wt%：C≤0.010%, Mn:0.05 ~ 1.5%, Si+Al：1.5 ~ 4.0%, remaining be Fe and It is remaining.Its technique is cold rolled annealed rear crystallite dimension≤50 μm, by stress relief annealing（920 ~ 1020 DEG C × more than 60s）Make crystalline substance Grain length is big, obtains fine magnetic property.The document needs follow-up stress relief annealing, and the temperature of stress relief annealing is also higher, Increased popularization difficulty.
It is entitled《A kind of manufacture method of cold rolling non-orientation silicon steel thin belt》Japanese documentation, it discloses chemistry into Divide and wt% is：C：≤ 0.005%, Si：≤ 1.0%, Mn：1.0 ~ 2.5%, P：≤ 0.15%, Al：1.5 ~ 3.5%, and Mn/Al：0.5~ 0.8, remaining is Fe and inevitable impurity, is processed through overpickling, normalizing and cold rolling after annealing and is obtained.The document is based on Si high With Al-Mn compositions high, adjustment magnetic density improves magnetic property, while also reducing production cost.But without raising specific performance Situation, medium-high frequency performance is not also referred to.
It is entitled《A kind of high working property energy cold rolling non-orientation silicon steel thin belt and its manufacture method》Japanese documentation, its Disclose chemical composition and wt% is：C：≤ 0.010%, Si：0.1 ~ 4%, Mn：0.5 ~ 1.5%, Al：0.1 ~ 4%, and Si+Mn+Al： 0.7 ~ 5%, S：≤ 0.0040%, Ti：≤ 0.0025%, remaining is Fe and inevitable impurity.Crystallite dimension is adopted up to 50 μm With method intermediate annealing process twice, finished products temperature is at 700 ~ 950 DEG C.The scope is very wide in range, refers to without clearly performance Mark.
It is entitled《A kind of low iron loss, excellent processing characteristics cold rolling non-orientation silicon steel thin belt and its manufacture method》Japan specially Sharp document, be it discloses chemical composition and wt%：C：≤ 0.010%, Si：0.1 ~ 4%, Mn：0.1 ~ 1.5%, Al：0.1 ~ 4%, and Si+Mn+Al：0.7 ~ 5%, S：≤ 0.0040%, REM：0.0005 ~ 0.0020%, remaining is Fe and inevitable impurity.Crystal grain Size≤50 μm, using method intermediate annealing process twice, finished products temperature is at 700 ~ 950 DEG C.Also need answer after punching Power is annealed, and be increased user and is promoted difficulty, and compositional ranges are excessively wide in range.
It is entitled《The cold rolling non-orientation silicon steel thin belt of excellent magnetic easy processing after a kind of stress relief annealing》Japan Patent Document, be it discloses chemical composition and wt%：C：≤ 0.010%, Si：1.5 ~ 2.5%, Mn：0.5 ~ 2.0%, Al：1.0 ~ 3.0%, And Si+2Al-Mn：>=2%, S：≤ 0.0040%, Ti：≤ 0.0020%, remaining is Fe and inevitable impurity, can also be added Plus Sn：0.02 ~ 0.04% and Cu：0.1~1.0%.Vickers hardness at crystallite dimension≤100 μm≤180,750 DEG C × 2h destressings More than 10% growth is had after annealing.Yet need to carry out stress relief annealing after punching, increased user and promote difficulty, and composition Scope is excessively wide in range.
It is entitled《It is a kind of to roll to the cold rolling non-orientation silicon steel thin belt manufacture method excellent with longitudinal magnetic performance》Japan Patent document, be it discloses chemical composition and wt%：C：≤ 0.002%, Si：0.1 ~ 0.8%, Mn：0.1 ~ 1.5%, Al：0.3~ 2.0%, and Si+2Al-Mn：>=2%, S：≤ 0.0020%, N：≤ 0.0020%, Ti：≤ 0.0020%, remaining is Fe and can not keep away The impurity exempted from, wherein V：≤ 0.003%, Zr：≤ 0.003%, Nb：≤ 0.003%, As≤0.003%.In average crystal grain chi after normalizing It is very little >=300 μm, reduction ratio 85 ~ 95% when cold rolling, by after 700 ~ 950 DEG C × 10 ~ 60s of finished products be obtained roll to longitudinal flux The excellent non-orientation silicon steel of performance.Scope is excessively wide in range in patent, fails to symbolize actual performance.
In the prior art, for prepare used in high-speed motor thin non-orientation silicon steel magnetic property with P1.0/400And B5000 The height of value characterizes the quality of the magnetic property of non-orientation silicon steel.The present patent application will propose a kind of compositional ranges more with regard to this index For accurate, the more excellent cold rolling non-orientation silicon steel of performance and its production method.
The content of the invention
The invention reside in overcome the shortcomings of prior art exist, there is provided a kind of compositional ranges are more accurate, magnetic（P1.0/400 ≤ 13.5w/kg, B5000The excellent i.e. yield tensile ratio of >=1.65T, processing characteristics is used in 0.74 ~ 0.78 medium-high frequency motor 0.27mm thickness non-orientation silicon steels and production method.
Realize the measure of above-mentioned purpose：
Medium-high frequency motor 0.27mm thickness non-orientation silicon steels, its component and weight percent content are：C：≤ 0.0028%, Si：2.61~3.05%, Al：1.05~1.48%, Mn：0.22~0.48%, Sn：0.14 ~ 0.49%, P≤0.022%, S: 0.0015~0.0029%, N：0.001~0.0025%, remaining is Fe and inevitable impurity；And control simultaneously：C+S+N+ O total amounts in≤0.010%, Si+Mn+Al+Sn total amounts in 4.34~5.20%, Mn/S in 100~320, Al/N 600~980.
The method for producing medium-high frequency motor 0.27mm thickness non-orientation silicon steels, its step：
1）Smelted using vaccum sensitive stove and cast ingot, in control endpoint molten steel：C+S+N+O total amounts 0~0.010%, Si+Mn+Al+Sn total amounts are in 4.34~5.20%, Mn/S in 100~320, Al/N 600~980；
2）Heated after cogging：Control heating-up temperature is incubated 45~75min at this temperature at 910~960 DEG C；
3）Hot rolling is carried out, control finish rolling finishing temperature is at 780~820 DEG C；It is hot-rolled down to 2.0~2.5mm of thickness of slab；
4）Carry out normalizing：Normalizing heating and temperature control is incubated 3~5min at this temperature at 920~960 DEG C；
5）Carry out pickling：Acid liquor temperature is controlled at 82~92 DEG C；
6）Carry out cold rolling：85~90%, finished product thickness is in 0.27 ± 0.010mm for cold rolling accumulative reduction ratio control；
7）Carry out finished products：In H2：N2=1:Carried out in 1 gaseous mixture, annealing temperature is controlled at 880 ~ 990 DEG C, and is moved back herein 150~250s is incubated at fiery temperature；
8）Routinely cooled down, sheared, sample preparation, magnetic and mechanical performance measurement.
It is：Finished products temperature according to：
T=837+(2.1×107) × [S] × [N] calculate,
In formula：T-expression finished product annealing temperature, unit is：DEG C,
The content of the sulphur in S-expression finished steel plate, is calculated using pure decimal,
The content of the nitrogen in N-expression finished steel plate, is calculated using pure decimal.
The effect of each element and main points of processes control in the present invention：
C：It is harmful element, when content is more than 0.0028%, magnetic aging, caused iron loss on the one hand can be produced to dislike in use Change；On the other hand more carbon can increase the cost of decarburization, it is therefore necessary to which control is ≤0.0028%.
Si：The resistivity of finished product can be increased and iron loss is reduced；But the increase of Si contents can cause cold rolling difficult and reduce Magnetic strength, therefore, to ensure that qualified high frequency performance need to control the content of Si between 2.61~3.05%.
Al：Can increase resistivity with Si is the same, reduce iron loss, also there is certain deterioration to magnetic strength, therefore, the content of Al Control is in the range of 1.05~1.48%；The content of this patent Al is more than the conventional trade mark, mainly considers from the following aspects 's.First, plus coarse grains and finished product texture improve after Al is conducive to annealing, reduce iron loss；Second, plus Al ratios add the Si there is phase To less processing hardening, advantageously reduce cold rolling edges of boards and split；Third, plus Al be conducive to improve silicon steel sheet punching processability. In addition, because the disperse educt of AlN can hinder crystal grain to grow up during finished products, and N is the impurity not being completely removed Element, it is therefore desirable to Al/N controls are between 600~980；Preferably, Al/N controls are between 740~840.
Mn：Hot rolled plate tissue and texture can be improved, promoted（100）With（110）Component is strengthened,（111）Component weakens, to carrying Magnetic high is favourable；Mn easily forms MnS with S, and thick MnS is conducive to crystal grain to grow up reduction iron loss；Manganese is that γ phase regions form unit Element, excessive manganese can reduce ferrite area, reduce finished products temperature and be unfavorable for growing up for crystal grain, therefore Mn contents exist 0.22%~0.48%.In addition, because the disperse educt of MnS can hinder crystal grain to grow up during finished products, and S be can not be complete The impurity element of full removal, it is therefore desirable to Mn/S controls are between 100~320；Preferably, Mn/S control 150~250 it Between.
Sn：Easily in grain boundaries segregation, can make（100）[uvw] component is strengthened and grain coarsening and is hindered（111）Recrystallization is brilliant The formation of core, so as to improve magnetic；But content can be cracked more than 0.15% when cold rolling, and cost, therefore Sn can be increased Content is 0.14%~0.49%.
Main alloy element of the invention is silicon, manganese, aluminium and tin, is the necessary condition for ensureing end properties.Why will Si+Mn+Al+Sn is limited in the range of 4.34 ~ 5.20%, just because silicon, manganese, aluminium and tin can not only reduce high frequency iron loss, it is desirable to Its content sum >=4.34% so that P1.0/400≤13.5w/kg；Also reduce magnetic strength simultaneously, it is desirable to its content sum≤5.20%, So that B5000≥1.65T；Additionally, being also required for certain intensity for the material of medium-high frequency electric rotating machine and there is appropriate bending Strong ratio, it is ensured that punching processing characteristics.
Carbon, sulphur, nitrogen, oxygen：It is impurity element of the invention, it is unfavorable to magnetic property, it is necessary to strictly control, therefore it is required that 0< C+S+N+O≤0.010%.
Phosphorus is residual elements, unfavorable to magnetic property, it is desirable to control P≤0.022%.
Technology controlling and process aspect：
The present invention why by the cogging heating-up temperature of steel ingot be designed as 910~960 DEG C, soaking time control in 45~75min, Primary concern is that on the one hand steel ingot is grilled thoroughly, i.e., hot to more than 910 DEG C, insulation more than 45min；On the other hand reduce as far as possible Scaling loss and control MnS, AlN and Cu2The solid solution of the second phase particles such as S.
The present invention why by hot rolling heating and temperature control at 880~920 DEG C, be incubated 50~70min, be primarily due to low In 880 DEG C, hot mill rolling pressure is big, it is difficult to roll target thickness；Higher than 920 DEG C, MnS, AlN and Cu are easily separated out2S etc. Secondary phase particle, it is unfavorable to properties of product；Soaking time control in 50~70min, primarily to be easy to each composition contrast and The need for control Solid Solution of Second Phase Particles amount；Why by finishing temperature control at 780~820 DEG C, mainly less than 780 DEG C, It is difficult to greatly roll target thickness because of draught pressure；More iron scale is also easy to produce higher than 820 DEG C, is unfavorable for the acid of rear operation Wash.
The present invention why by normalizing heating and temperature control at 920~960 DEG C, be incubated 3~5min, be primarily due to temperature 3min is less than with soaking time less than 920 DEG C, microstructure homogenization can not be reached；Temperature is more than higher than 960 DEG C with soaking time 5min, had not only easily separated out second phase particles but also had caused energy waste, or rolling after being unfavorable for.
The present invention why will cold rolling accumulative reduction ratio control 85~90%, mainly receive raw thickness and finished product thickness Constraint.Reduction ratio is too small, and rolling pass is more, and finished product template is bad on the contrary；It is unfavorable for forming the cold rolling change favourable to magnetic property Shape texture.
The present invention why by finished products temperature control at 880~990 DEG C, be incubated 150~250s because temperature is less than 880 DEG C and soaking time are less than 150s, can make that recrystal grain is smaller to be unfavorable for reducing iron loss；Temperature is higher than 990 DEG C and is incubated Time is more than 250s, then the grain size of finished product tissue is excessive unfavorable to punching.Its annealing temperature page can be according in composition [S], [N] content, according to annealing temperature T [DEG C]=837+ (2.1 × 107) × [S] × [N] calculate its annealing temperature.In experiment Middle discovery, [S], [N] content is high that relatively large number of MnS, AlN and Cu can be generated in hot rolling2The second phase particles such as S are, it is necessary to more Annealing temperature high is grown up promoting crystal grain.
The present invention is by the composition in smelting process（Si+Mn+Al+Sn, Mn/S, Al/N）Control, exactly in order to fully send out Wave advantageous effect of the main alloy element in Physical Metallurgy；By strict control impurity element total amount and process optimization, production Go out a kind of medium-high frequency motor non-oriented electrical steel that magnetic property and processing characteristics are taken into account.On the one hand medium-high frequency can be reduced Iron loss improves magnetic strength and realizes having excellent magnetic characteristics；On the other hand ensure that production board has appropriate yield tensile ratio, meet user's punching and add The need for work.
The present invention compared with prior art, is ensureing magnetic property P1.0/400≤ 13.5w/kg, B5000On the premise of >=1.65T, The index of mechanical performance is taken into account by force than 0.74 ~ 0.78, the use requirement of manufacture medium-high frequency motor iron core can be met.
Specific embodiment
The present invention is described in detail below：
Table 1 is the comparative example of various embodiments of the present invention and comparative example；
Table 2 is the main technologic parameters list of various embodiments of the present invention and comparative example；
Table 3 is various embodiments of the present invention and comparative example performance text list.
Various embodiments of the present invention are produced according to following steps：
1）Smelted using vaccum sensitive stove and cast ingot, in control endpoint molten steel：C+S+N+O total amounts 0~0.010%, Si+Mn+Al+Sn total amounts are in 4.34~5.20%, Mn/S in 100~320, Al/N 600~980；
2）Heated after cogging：Control heating-up temperature is incubated 45~75min at this temperature at 910~960 DEG C；
3）Hot rolling is carried out, control finish rolling finishing temperature is at 780~820 DEG C；It is hot-rolled down to 2.0~2.5mm of thickness of slab；
4）Carry out normalizing：Normalizing heating and temperature control is incubated 3~5min at this temperature at 920~960 DEG C；
5）Carry out pickling：Acid liquor temperature is controlled at 82~92 DEG C；
6）Carry out cold rolling：85~90%, finished product thickness is in 0.27 ± 0.010mm for cold rolling accumulative reduction ratio control；
7）Carry out finished products：In H2：N2=1:Carried out in 1 gaseous mixture, annealing temperature is controlled at 880 ~ 990 DEG C, and is moved back herein 150~250s is incubated at fiery temperature；
8）Routinely cooled down, sheared, sample preparation, magnetic and mechanical performance measurement.
Step 7）In, finished products temperature also can be according to：
T=837+(2.1×107) × [S] × [N] calculate,
In formula：T-expression finished product annealing temperature, unit is：DEG C,
The content of the sulphur in S-expression finished steel plate, is calculated using pure decimal,
The content of the nitrogen in N-expression finished steel plate, is calculated using pure decimal.
The comparative example of the various embodiments of the present invention of table 1 and comparative example（wt%）
The main technologic parameters list of the various embodiments of the present invention of table 2 and comparative example（One）
The main technologic parameters list of the various embodiments of the present invention of continued 2 and comparative example（Two）
The various embodiments of the present invention of table 3 and comparative example performance text list
As seen from Table 3, comparative example 1：Because of Si+Mn+Al+Sn=3.16%<4.34%, C+S+N+O=0.0101%>0.010%, and Mn/ S=46 ＜ 100, Al/N=274 ＜ 600, causes P1.0/400=17.11 ＞ 13.5W/kg, B5000=1.635 ＜ 1.65T, magnetic property is not Close, and yield tensile ratio=0.67<0.74, magnetic strength yield tensile ratio is relatively low；Comparative example 2：Because of Si+Mn+Al+Sn=3.39%<4.34%, C+S+N+ O=0.0107% ＞ 0.010%, and Al/N=254 ＜ 600, even if Mn/S=165 ＞ 100, also cause P1.0/400=17.11 ＞ 16.99W/kg, B5000=1.607 ＜ 1.65T and yield tensile ratio=0.72 ＜ 0.74, high-gradient magnetism does not conform to relatively low with yield tensile ratio；Contrast Example 3：Because of Si+Mn+Al+Sn=3.79% ＜ 4.34%, and C+S+N+O=0.0124%>0.010%, Mn/S=73 ＜ 100, even if Al/N=620 ＞ 600, still result in B5000=1.626≤1.65T and yield tensile ratio=0.84 ＞ 0.78, magnetic strength is relatively low and yield tensile ratio is inclined It is high.Comparative example 17：Although C+S+N+O=0.0085%<0.010%, but Si+Mn+Al+Sn=5.63%>5.20%, and Mn/S= 458 ＞ 320, even if Al/N=732 ＞ 600, still result in P1.0/400=14.15 ＞ 13.5W/kg, yield tensile ratio=0.82>0.78, high frequency Iron loss is higher with yield tensile ratio；Comparative example 18：Although C+S+N+O=0.0086%<0.010%, but Si+Mn+Al+Sn=5.87%> 5.20%, cause P1.0/400=16.40>13.5w/kg and yield tensile ratio=0.87>0.78, iron loss and yield tensile ratio are higher；Comparative example 19： Because of C+S+N+O=0.0112%>0.010% and Si+Mn+Al+Sn=6.06%>5.20%, cause P1.0/400=16.12> 13.5w/kg, yield tensile ratio=0.89>0.78, iron loss and yield tensile ratio are higher；Comparative example 20：Because of C+S+N+O=0.0128%> 0.010% and Si+Mn+Al+Sn=5.95%>5.20%, cause P1.0/400=13.90>13.5w/kg and yield tensile ratio=0.80> 0.73, iron loss and yield tensile ratio are higher.Only Si+Mn+Al+Sn controls 4.34~5.20%, and C+S+N+O≤0.010%, Mn/S is controlled between 100~320, embodiment of the Al/N controls between 600~980, could simultaneously meet magnetic property （P1.0/400≤ 13.5w/kg, B5000≥1.65T）With mechanical performance (0.74≤yield tensile ratio≤0.78) requirement.
This specific embodiment is only most preferably to enumerate, not to the restricted implementation of technical solution of the present invention.

Claims (3)

1. medium-high frequency motor with 0.27mm thickness non-orientation silicon steel, its component and weight percent content are：C：≤ 0.0028%, Si：2.61~3.05%, Al：1.05~1.48%, Mn：0.22~0.48%, Sn：0.14 ~ 0.49%, P≤0.022%, S:0.0015~0.0029%, N：0.001~0.0025%, remaining is Fe and inevitable impurity；And control simultaneously：C+S + N+O total amounts≤0.010%, Si+Mn+Al+Sn total amounts 4.34~5.20%, Mn/S 100~320, Al/N 600~ 980。
2. the method for producing medium-high frequency motor as claimed in claim 1 0.27mm thickness non-orientation silicon steels, its step：
1）Smelted using vaccum sensitive stove and cast ingot, in control endpoint molten steel：C+S+N+O total amounts 0~0.010%, Si+Mn+Al+Sn total amounts are in 4.34~5.20%, Mn/S in 100~320, Al/N 600~980；
2）Heated after cogging：Control heating-up temperature is incubated 45~75min at this temperature at 910~960 DEG C；
3）Hot rolling is carried out, control finish rolling finishing temperature is at 780~820 DEG C；It is hot-rolled down to 2.0~2.5mm of thickness of slab；
4）Carry out normalizing：Normalizing heating and temperature control is incubated 3~5min at this temperature at 920~960 DEG C；
5）Carry out pickling：Acid liquor temperature is controlled at 82~92 DEG C；
6）Carry out cold rolling：85~90%, finished product thickness is in 0.27 ± 0.010mm for cold rolling accumulative reduction ratio control；
7）Carry out finished products：In H2：N2=1:Carried out in 1 gaseous mixture, annealing temperature is controlled at 880 ~ 990 DEG C, and is moved back herein 150~250s is incubated at fiery temperature；
8）Routinely cooled down, sheared, sample preparation, magnetic and mechanical performance measurement.
3. the method for producing medium-high frequency motor 0.27mm thickness non-orientation silicon steels as claimed in claim 2, its feature exists In：Finished products temperature according to：
T=837+(2.1×107) × [S] × [N] calculate,
In formula：T-expression finished product annealing temperature, unit is：DEG C,
The content of the sulphur in S-expression finished steel plate, is calculated using pure decimal,
The content of the nitrogen in N-expression finished steel plate, is calculated using pure decimal.
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